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Monthly Archives: December 2014

I’ve put together a tool for testing servers for the presence on DNS based mail block lists. We have a few mail servers under our management. On occasion it’s nice to be able to check for their presence on various DNS block lists. My goal is to have a Nagios check plugin as well as command line tool to perform lookups. The first crack at it can be installed as a ruby gem or or found in the rebbler github respository.

In addition to the command line interface and Nagios check functionality it can be run as a web server making use of the Sinatra micro framework.